Start Date
4-1968 8:00 AM
Description
In ground receivers for space applications, a bank of filters is frequently used to demultiplex the received subcarriers. Such filter banks are also frequently used for measurements of the doppler shift of the received signals. These filters are generally characterized by having a narrow bandwidth. This means that they are rather costly and often difficult to construct to the desired specifications. Since the baseband structure varies from mission to mission, the useful life of these baseband filters is short.
An alternate approach to the filtering problem that can cut cost and increase flexibility while at the same time improve system performance is therefore welcome. Such an approach exists in digital filtering.
A digital filter is a computer program that allows digital computer to be used as a linear filter. Such programs can now be written for a general purpose computer that allows the computer to be used as a filter bank in real time.
Digital Filtering in Space Communication
In ground receivers for space applications, a bank of filters is frequently used to demultiplex the received subcarriers. Such filter banks are also frequently used for measurements of the doppler shift of the received signals. These filters are generally characterized by having a narrow bandwidth. This means that they are rather costly and often difficult to construct to the desired specifications. Since the baseband structure varies from mission to mission, the useful life of these baseband filters is short.
An alternate approach to the filtering problem that can cut cost and increase flexibility while at the same time improve system performance is therefore welcome. Such an approach exists in digital filtering.
A digital filter is a computer program that allows digital computer to be used as a linear filter. Such programs can now be written for a general purpose computer that allows the computer to be used as a filter bank in real time.
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